Having problems with your 2002 GMC Envoy ?
2002 GMC Envoy transmission problems
\015 Just got a 2002 Envoy that has been parked for 2 years. The transmission was slipping so I changed the filter and fluid, doesn't slip now, but the only way it will shift is to back off the gas when the revs go up and step on it again to change gears. But it only works in A4WD, the lights flash for 2hi but it won't go in. Also there are 2 plugs unplugged and all corroded that plug into a box under the drivers door attached to the frame with what looks like brake or transmission lines coming out of it. Could this have something to do with the problem?\015
Repair Help & Product Troubleshooting for 2002 GMC Envoy
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